3D contact paramters for various conditions

Hello friends,Is anyone aware of the various 3D contact parameters that should be used for variousmaterial combinations and working conditions?( As you know UG provides only oneset of values for general engineering conditions and steel as material)If anyone is aware of any handbook or knows someone who might help me please mailme the contact info.( I would request anyone replying to this post to mail me a copy directly to sanjoy.choudhuri@tcs.com)Thanks to all..Sanjoy ChoudhuriTata Consultancy ServicesUG Support,Kolkata